As is known to all, __________ People's Republic of China is __________ biggest developing country in the world.
| A．the; / | B．the; the |
| C．/; the | D．/；/ |
Great changes _______ in China in the past 20 years.
| A．took place | B．have taken place |
| C．were taken place | D．have been taken place |
The world today _____ different without the amazing discoveries produced by great scientists.
| A．were | B．had been | C．would be | D．would have been |
I was surprised to find the snack shops around the school empty; the students everything!
| A．had been buying | B．had bought |
| C．have bought | D．have been buying |
The driver suggested that we set out before seven in the morning in order to avoid traffic jams.
| A．should | B．might | C．could | D．would |
—I’m sorry I have no cash in hand.
—. I’ll pay for everything.
| A．Take your time | B．You’re right |
| C．Whatever you say | D．Take it easy |